Abstract
We use an extension to the infinite dimension of the rank theorem of the differential calculus to establish a Lagrange theorem for optimization problems in Banach spaces. We provide an application to variational problems on a space of bounded sequences under equality constraints.
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I thank the reviewers very much for helping me improve the contents of the paper, especially the one who kept me from making a mathematical mistake and whose suggestions were very useful and constructive.
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Blot, J. Rank Theorem in Infinite Dimension and Lagrange Multipliers. Appl Math Optim 81, 815–822 (2020). https://doi.org/10.1007/s00245-018-9520-y
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DOI: https://doi.org/10.1007/s00245-018-9520-y